Driving attachment for magnetos



Sept. 25 1923. I 1,468,883

' A. ROSNER DRIVING ATTACHMENT FOR MAGNETOS Filed Dec. 23, 1921 2 Sheets-Sheet 1 Fig.1 I 14 ATTORNEY Patented Sept ;2 5, 1923.

. uurrso STAT anoLPr-r nosnnaiorSPRINGFIELD.ivrhssnciznsnrrs, assrs i' onro airnnroa v Boson amen-E1 coaro'aariou, or SPRINGFIELD, ivisssaonusnrrsn ooaroaarrouor NEW YORK.

DRIVING ATTACHMENT Fora naeivnrosfl Application and December 23, 192 seriaifiio, 524143; 1

' To all whom it may concern:

Be it knownthat I, AnoLPHRosuER, a citi zen of the United States, residing at at Ventura- .Street, Springfield,;iin the county of "Hampden, State of, Massachusetts, have inventedcertain new and useful Improvements in Driving Attachments for llfagnetos; and I-do hereby. declare the following to be a full, clear, and exact descriptionofthe in- -vention,- such aswill'enable others skilled in the art to :which appertains to make and i use the'same. j

.The present invention relates to driving attachments for driving, from internal com- 'bustion'engines, magne.tos to supply ignition currentto the cylinders of the'engine, and

relates more particularly to the attachment of that kindintended to be-installe-d on exist ing engines of different types; upon automobile's, tractors and other moving vehicles, as well as on stationary engines.

'Heretofore, it wasgcustomary to drive the magneto, mounted on the engine, either-"at the front end or at one side thereof, by a Tchain passing over sprocket wheels fastened.

to the magneto .shaft and' the'cam shaft of the engine, or by spur gears on these shafts with or without-intermediate gears, the'gearr ing in either type being enclosed in comparativelylarge housings extending therearound and from shaft to shaft. In some cases, the:

driving means comprised. a magneto drive shaft having bevel or spiral gears meshing with similar gears on the cam and magneto shafts, and each pair of meshedgears had a housing, but the magnetodrive shaft. was not housed or protected.

the individual gear housings, the gears on this shaft being in thrust contact with the alignment of the shaft therewithfi In accordance with-this part of my inven tion. the gear housings are connected by a torque member, preferably in the form of a tube which may-encloseor house the mag neto driveshaft. the ends of this member'or tube fitting tightly in the respective housings, preferably in elongated hub portions preferably having elongated fastening-aper- V Such shaft also was of the floating type and had bearings in ings inthe housings. The hubs may' have therein, bearingniembers, preferably in the 7 form of bushings, against which the ends of the torque member may abut in furtheraid.

In accordance with another :p artof .my in:-

ofmaintaining the rigidity of the: assembly.

vention, the gear housing at the engine shaft;

has legs which are secured to the frame-of.

theengine, these legs preferably-extending f radially from the gear liousingyjand also tures. By such construction, the housings,-

the magnetov drive shaft with the gears thereon and the torquemember may. be assembled 3 as a unit, and this unitfmay then gbe installed in place by'a'simple f'asteniiigof the 'hous ings to the engine'and magneto 'frames,jfit

being understood that the magneto has pre j viously been-installed upon a suitable bracket fastened to the side of-theengine frame near the front end: thereof- 31m elongated'fastening openings infthe legs of the gear housing at the engine shaft will permit the necessary angular adjustment "requirednto properly connect the gear housing, at. the 'magnetof I vea In the accompanying; drawing'illustratingshaft, tothe frame of the'ma-gnet'o.

my invention, in application, as an example,

to a Ford type of'engine with a magneto driven from'the cam'fshaft of .theengineg:

Fig. l is a front elevation of the attachment applied to the. engine of a Ford automobile; Fig. 2 is a side elevation thereof:

Fig; 3 is a front elevation of the attachment H as applied to an engine of a Fordson' tractor;

Fig. l is a side elevation-thereof; Fig. 5 is a front elevation on an enlarged scale of'a housing atthe engine shaft of Fig. lwith the cover removed ;}'Fig: 6' is a. section online 6 -6 of Fig. 5 Fig.7 isa'front elevation on an enlarged scale of a housing atthe magneto shaft ofFig; 1 with the cover removed;

Fig. 8 is a view in section takenjon line 8-8;

of Fig. 7 Fig. '9 is aview in section taken on line 99 of- Fig. 6; Fig. 10 1s a deta l sectional viewofone of the-securing means for the magneto supporting brackets; {and .Figs. 11 and 12 are detail 'sectional views taken on lines '11-11 and 1212'of Figs. 8 and 6, respectively. Y r Referring more particularly to 7 Figs. 11,.

2, 5 and 6, thezcam shaft 1 of the engine 2 is driven in anti-clockwise direction by a crank shaft 3 through 1:2 speed reducing gear (not shown). An oil well a is integrally formed with a cover or plate 5 boltdrive the latter in anti-clockwisedirection at'half'speed. A water duct 11 and an oil well 12 may be formed integral with the cover 8, the oilwellbeing located at the: rear 1 of the water duct. l The driving attachment illustrated 111F195.

1 is substantially the same as that shown in Fig. 3, excepting the drive shaft 13 of Fig. 1 is shorter than that of'Fig/35the attachment, in other respects, extending across the front of the engine and providing for different axial positions thereof to accommodate the magnetosll 01'15 indifferent relations to the engine, as shown. 7

As shown particularly in Figs. 5'to 9, inclusive, the attachmentconsists of a spiral gear 16 made fast upon theend of the cam shaft-1 and a spiral gear 17 made fast upon the armature shaft 18 of the magneto, the mechanical connections between them comprising the drive shaft 13 on which are non rotatably secured, by suitable keys 19 .and 20, spiral gear-s21 and 22, respectively in mesh with the gears 16 and 17. Both ends of the shaft 13 have reduced portions 23 and 24 to receive the gears 21 and 22. The ends 27 and 28 of the shaft are threaded to recei e nuts 29 and 30 and lock washers 31 and 32 thrusting respectively;against one side of the gears 21 and 22, the other side of said gears being seated against the shoulders 33 and 3 1 on the shaft 13. It will thus be noted that the gears'21 and 22 are so fastened to the drive shaft 13, that such gearswill not move either longitudinally or angularly with respect to the shaft 13.

The gear 16 is fastened to the shaft 1 by means of a clutch device comprising a hub nut 35 threaded upon the shaft 1 and hav ing a pair of axial tongues 36 extending into a selected pair of radialislots 37 formed in the rear end of the gear 16, the latter otherwise fittingloosely upon the unthreaded end portion 38 of the shaftl, but capable of being driven therewith through the above described cliitch. The slots 37 are'angularly spaced to a unit'of a half-tooth space of the gear 16,'in orderthat a liner angular ad justment may be had than would be possible by a'mere enmeshment of the gears 16 and 21. The outer endof the shaft 1 is screw threaded to receive a thrust nut39- abutting against the outer' endof the gear 16 and adapted: to holdsuch gearn clutch engageinentwith the member 35,1 a'sals clearly shown in F 1g. 6 of the drawing. The ,splral gear on by a nut42 andloclr-washer43,

Each pair of meshed gears 16, 21 or 17,

17 is fastened to the magneto shaft 18by keying its tapered hub 40 to the sfhaft'18j by a key d1 and'holding it in position there- 22.is'enclosed.in a separate housing. The

housing at the cam shaft 1 of the engine comprises a body p'ortlon 44 formed with a plurality of radiallyextending legs'ila. and e6',there being but two legs shown in Fig. 1 J

,of the drawing, although it will-be understood that any number of legs may be used, asdesired. The outer'ends of the legs are.

provided with elongated. aperturesrfl fl" through which pass securing bolts 18 connested to'the plate -5,.thus securing the house-- ing 11,- with the legst5 and 46 thereof, to?

the plate 5. The plate 5*has an angulari;

shoulder d9 coo aeratin with a shoulder or:

. I rim 5Oformedintegralw1th theghousing 44,

such that the rim 50 fits closely within the;

shoulders 19, with a; flange portion 51 over-j lapping'the outer surface of the-shouldeii lt); The housing 14-, as 1s clearly shown 1n Flgs 5 and 6 has a central chamber 52' a'nd an upper chamber 53 enclosing the gears 16 and 21, respectively, when in mesh. The hous- I ing +11 also has a lateral extension or hub .54

forming a bearingfor the drive, shaft 13,

such bearing being provided with a suitable bushing for such shaft. At the central outer portion of the housing 1-1- is provided a threaded aperture in which is threadeda thrust screw 56, the inner end'of which abuts against the outer end of the shaft lfor the purpose of preventing axial play or motion of-the shaft. 1 and the, gear 16 during the operation of the engine, a lock nut 57 being used to maintain the abutment screw in adjusted position. Q

The housing 59 for the set of cooperative gears'17 and 22 atthe'magneto shaft 18 is fastened to an adapter plate 58 which is se cured to the end of the niagneto'by bolts 60,

as is clearly shown in Fig. 7 of thedrawing, the part 59 havinga flange61 into which the bolts are threaded] This housing is formed with central and upper chambers 62 and 63, respectively, including the gears 17 and 22, andalso has a lateral extension or hub 64- forming a bearing for the upper end of the shaft'l3',-a suitable bushing 65 being interposedbetween the shaft and the hub 64, as is clearly shown in Fig. 70f the draw-.

the upper or outer :end of the shaft 13, so that it will not move either longitudinally or angularly with respect to such shaft, and has interposed between the gear 22 and an end of the bushing 65, a thrust washer 66, the latter-actingas a thrust bearing mem-' her for the gear 22, as the lattertends to i a ing. The gear 22, as above stated, is keyed to r maintains it in adjusted position.-

move toward the left, as' viewed ingFigs. 7 and '11 of the drawing, thus preventing such movement and maintaining the gear 22in proper mesh with the gear 17. The housing of, a thrust screw 67 abutting at its inner .end against therouter end portion of "the shaft 13 for thepurpose of preventing iaxial. play :or motion of the 'shaft13: and gear 22.

A look nut-'68threaded upon the bolth67- Inaddition to the securing'bolts AS pasS-I ing through the legs45 and 460i the lious,

ing i, a spring arm 69may also be used to V aid in maintaining the housing 44:, together i with the legs 45 and 46, in place against the" plate 550i the gear casing, thespring 69 being connected at onset its ends to a part of the engine, such as the oil well 4, by means of-ascrew or bolt 70- andi bearing at the other endof such spring arm upon thefcover'ta of the housingythe latter being provided tion 72 ot' the Jspringarm '69 is 'adapted to rest; The apertures 47,,"in the ends of the arms toand 46, are preferably elongated, in angular" direction about the axis of the shaft 1;, in order that a' cer tain amount of angular adjustment may be per; mitted whenthe'housing 44; is applied in place when the attachment is connected, to.- the' engine and magn'eto, such adjustment being usually'necessary'to compensate for whatever manufacturing va'riations'may be present in the several parts when mounting the magneto and attachment in place upon 1 the engine. The shaft 1-3 is housed or encased in a tubular, member extending between and into the hearings or hubsa t and 64' with the ends 'of'the housing '73 abutting the ends of the bushings and 65, *as is clearly shown inFigs'i. 5 a'nd'Tiof thetlrawing'. The tubular 'membertsfis alsoprovided wit-h a collar 74 into which is-threada ed a grease cup 7 5 from which? suitable "lubricant may be fed into the interior of the housing member 73 and around the shaft 13, such lubricant working its way, under pressure, along the-shaft into the bearings 51L and 64s andsthebushings 55 and 65.' The bushings'55 and are'formed with grooves 7 6 and 77 for the purposeof facilitating the" feed of the lubricant to the parts and sure cant may also Work its way into the gear housings and 59, if desired, to a sufficient extent to lubricate the engaging parts'of the gears 16, 21, 17 and 22, as will-bean- 1' parent from the drawing.

7 aligning member; The hubs Leland 645are ofsubstantial length andtli'e end portions substantial distance, as well -as fitting;

tightly therein with. the eflect'of causingzai self-alignment of the parts when assembled 59 also has threaded through the side there-v Should the magneto be so mounted that its" base is not exactlyata normal to the plane of the inner faces offthe gear housings, the

, fit to their respective seats or plates 5 and 58ewithoute strain. Inasmuch'as-the ends of the housing 73 abut with the 'endsjoithe sleeves orrbushings 55 and 65, the-spaced relation of-the hubs 44 and 64 is maintained Any torque-tendencies of; either gear housing will be resisted by the housnasmuch-asthe gears 21' and 22 areaxie j ally-fixed upon the. shaft 13 and-'also that these-gears are 'of the spiral type, it iis ob V vious that the driving action of the gear 17 with a recess 71 in which the depressed p'orupon the gear 21, as well as the gear 22 upon the gear 17, will have a tendency to cause suchgears and shaft 13 to move longitudinally oft-he axis thereof In the-form. shown, this movement would be in a direce tion to the left,1as'illustrated in Figs"1,:'3, 5 V

1 and7'of the drawing In-order' to prevent such movement or in order to take up the thrust ot'the shaft, the thrust-washer 66 is provided betweenthe gear29 and the up- I mentjis maintained so that the relation of V speeds-between'that otthearmature shaft of the magneto and the cam shaft of the en gine', will not vary, irespeotive of the vibrah tions the engine maybe subjeotedto'.

Inasmuch as" the attachment for. the F ord-q son engine, as shownin Figs; 3 and' i'o't' thedrawing, is substantially the same'as that shown in Figs. 1'and2, repetition o f the description of'the structure will notbe madeflIt will be observed, however, that in the latter structure, the housing i izisshown as having three legs 78,79 and S0,

the spring arm 69, used-in the -,structure, shown in Figs. 1 and 2,"beings mi d' int V this structure. It has'been found,'by eX- faces to be lubricated thereby. This lubriperiment,'that it is not necessary to :use'

three legs in a Fordson' fitti'ng, but that two legs are sufiicient, the leg 80 being preferably omitted in such case;

In the arrangement shown in Figs'l and 2, themagneto 14sis mounted upon a bracket 81 bolted to the casing Got the engine by suitable bolts' 82 and connection'83'. The

latter comprises one or morestucl boll-s84c f fastened in the engine casing and extending" therein; The arm 85 has a boss '87 closelyi through the.ar1n85;into a recess 86 formed V of-the drawing.

In the arrangement shown in Figs. 3 and i, the -magneto15 iss nnlarly bolted to a bracket 93 by means of screws Si l. thebracket 93 being secured to the side ofthe' frame of the engine by'bo ts 95 and 96; is

clearly shown in Fig. l of the (llfiivlflfl';

The magneto 15, in such case, is ata lower position than the magneto 1 shown in Fig. 1, thus requiring a lower location of,

the shaft 13. o. 7

Having thus disclosed my invention what I claim is: V 4

1. In an internal combustion engine having a magneto for supplying ignition-min" rent thereto, the combinationofa driving attachment for driving said magneto from said engine and comprising a gear on a shaft of the en ine a ear on the shaft of the magneto, a drive shaft having gears thereon and meshed with the respective gears on said engine and magneto shafts,

gear housings enclosing the meshed gears at said engine and magnetoshafts, and a torque member connected to said housings to maintain a fixed relation between said drive shaft and said housings. i

2. In an internal combustion engine hav ing a magneto for supplying ignition cur rent thereto, the combination of a driving attachment for driving said magneto from said engine and comprising a gearon a shaft of the engine, a gear on the shaft of the magneto, a drive shaft having gears thereon and meshed with the 'respective gears on said engine and magneto shafts,

gear housings enclosing the meshed gears at said engine and magneto shafts, and a tubular torque member connected to said housings to maintain a fixed relation between said drive shaft and said housings.

3. In an internal combustion engine having a magneto for supplying ignition current thereto, the combination of a driving attachment for driving said magneto from said engine and comprising a gear on a shaft ofthe engine, a gear on the shaft of the magneto, a drive shaft having gears thereon and meshed with the respective gears on said engine and magneto shafts. gear housings enclosing the meshed gears at saidengine and magneto shafts, and a housing en losi-i set screw 91 is then threaded into the bracket 8t by screws 92, as is clearly shown in Fig.

saidigea rl housings tomaintainl a fixed relation. between sa d driveshaft and saidgear housings. Y r, v

4.111 anmternal combustion engine hav ing a magneto for supplying ignition curing said drive shaft and being connected to rent thereto, the combinationof a driving attachment fordriving: said magneto from said engine-and comprising a gear on a shaft of the engine, agear on the "shaft of-the magneto, a drive shaft having gears-thereon and meshed with the'respective gears on said engine and magneto shafts, gear housings enclosing the meshed: gears at said engine" and magneto shafts," and a tubular housing enclosing said drive shaft and being con nected to said gear housings: to maintain afixed relation between said drive shaft and said gear housings.

5. Inan internalcombustion engine hav-" ing a magneto for supplying ignition cur,-

rent thereto, the combinationof a driving attachment for ClIflVHIgASELKl magneto from:

said engine and comprising a gear on a shaft of the engine, a gear on the shaft of the magneto, a drive shaft havinggears thereon and meshed with the respective gears on said engine and magneto shafts, gear housings enclosing the meshed gears at said engine and magneto -shafts, and;'a torque member having-its ends fitting tightly in said housings to maintain afixed relation between said drive shaft and said housings. 6. In an internal oombustionengine having a magneto for supplying ignition currentthereto, the combination of a driving attachment for driving said'magneto from said engine-and comprising a gear on a shaft of the eng1ne,-a gear on the shaft of the magneto, a drive shafthavinggears thereon and meshed with the respective gears on said engine I and magneto. shafts, gear housings enclosing the meshed gears at said engine and magneto -shafts, and-a tubular torque memher'having itsends fitting tightly in said housings to maintain a fixed relation betweensaid drive shaft and said housings. TVIn an internal combustion engine hav-g ing a magneto for supplying ignition current thereto, the combination of a driving attachment for drivlng said magneto from said engine and comprising a gear on a shaft of the engine, a gear on the shaft of the magneto, a, drive shaft having gears thereon and meshed with the respective gears on said engine'and magneto shafts,

gear housings enclosing the meshed gears at said engine and magneto shafts, and a housing enclosing said shaft and having its ends fitting tightly in said housings to main tain a fixed relation between said drive shaft and said. housings.

8. In an internal combustion engine having a magneto for supplying ignition cur- 'rent'thereto, the combinatlon of a driving attachment for driving said magneto from-I said engine and comprising a gear on a shaft of the engine, a gearon'the shaft of the magneto, a drive shaft having gears thereon and 'meshed with the respective gears on said engine and magneto shafts, gear housings enclosing the meshed gears at said engine and magneto shafts, said gear housings having elongated hub portions,

and a torque member having its ends. fit

ting tightly in said hub portions to maintain a fixed relation between said drive shaft and said gear housings. i

9. In an internal combustion engine having a magneto for supplying ignition current thereto, the combination of a driving attachment for driving said magnetofrom said engine and comprising a gear ona shaft of the engine, a gear on the shaft of the magneto, a drive shaft having gears thereon and meshed with the respective gears on said engine and magneto shaftsf ear l1Ol1S11'l S 8110108111 the meshed ears at 1 D i D thereon and meshed with the respective' gears on said engine and magneto shafts, gear housings enclosing the meshed gears at said engine and magneto shafts, said gear.

housings having elongated hub portions,

and a housing enclosing said drive shaft and having its ends fitting tightly in said hub portions to maintain a fixed relation between said drive shaft and said housings. V

7, 11.7111 aninternal combustion engine having a magneto for supplying ignition current thereto, the combination of, a driving attachment for driving said magneto from gear :said'engine and. comprising a gear on a shaft of the engine, a gear on the shaft of the magneto, a drive shaft having gears thereon and meshed with the respective gears on said engine and magneto shafts, gear housings enclosing the meshed gears at said engine and magneto shafts, said gear housings having elongated hub portions,

bearing members fixed in said hub portions,

and a torquemember having its ends fitting tightly in said hub portions and in abuttingkcontact with said bearing members to maintain a fixed relation between said' drive shaft and said gear housings. c

12. In an internal combustion engine hav ing a magneto for supplying ignition current thereto, the combination of a driving shaft of the engine, a gear on theshaft'of the magneto, a drive shaft having gears 'thereon and meshed with the respective attachment for driving said magneto from said engine and comprlsing a gear on a gears on said engine and magneto' shafts, i 7

gear housings enclosing themeshed gears at said eng ne and magneto shafts, said gear housings having elongated hub portions,

bushings fixed in saidhub portions, and a torque member having its ends fitting tightly in said hub portions andin abutting con tact with said bushings, to maintain a fixed relation between said drive shaft and said gear housings. V i

In testimony whereof I aflix my signature. 7

ADOLPH ROSNER. 

